Void Filling
Underground voids can form beneath buildings and infrastructure due to washout, dissolved materials, collapsed drains, or old mine workings. These voids pose a significant risk of sudden ground collapse. Our void filling service uses controlled injection techniques to safely fill these spaces and prevent further settlement.
Signs You Need Void Filling
Sudden Ground Depression
Areas of ground that have suddenly dropped or appear sunken near your property.
Sinkholes in Gardens or Paths
Small sinkholes or depressions appearing in lawns, driveways, or adjacent ground.
Cracking in Multiple Areas
Cracks appearing across multiple walls or rooms simultaneously, suggesting ground movement below.
Hollow Sound Underfoot
Areas of flooring that sound hollow when walked on, indicating a void beneath.
Why Act Early
Prevent Sudden Collapse
Voids can collapse without warning. Filling them early eliminates the risk of sudden, dangerous ground failure.
Stop Voids Growing
Voids tend to expand over time as surrounding material erodes. Early filling stops them getting bigger and more costly to treat.
Protect Your Property
Voids beneath your property compromise its foundations. Addressing them early prevents structural damage.
Key Benefits
Controlled injection process
Non-destructive method
Prevents sudden collapse
Rapid completion times
Sub-surface void detection
Suitable for all void types
Pros & Cons
Advantages
Considerations
How It Works
Detection
Ground penetrating radar and other methods to locate and map voids.
Planning
Injection plan designed based on void size, location, and cause.
Filling
Controlled injection of grout or resin to fill the void safely.
Verification
Post-treatment scanning confirms complete void filling.
Frequently Asked Questions
How do voids form under buildings?
There are several causes. Voids can form from collapsed drains, soil washout, dissolved chalk or limestone, old mine workings, or degraded fill materials. In the North East, historic coal mining is a particularly common cause.
How do you detect underground voids?
We use specialist equipment including ground penetrating radar (GPR), dynamic cone penetrometers, and trial pits to locate and assess voids beneath your property accurately.
What materials are used for void filling?
It depends on the void. We use geopolymer resin, cementitious grout, or foamed concrete depending on the void size, depth, and ground conditions. Each material is chosen for optimal performance in your specific situation.
Is void filling disruptive?
No, the process is minimally invasive. Small injection holes are drilled and the filling material is pumped in under controlled conditions, with little disruption to your property or daily routine.
Free Void Filling Quote
No obligation — we'll respond within 24 hours
Void Filling Across the North East
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